The mission

Make Warhammer 40,000 list building and game-day reference feel clear, fast, and at home on every screen—without putting essential tools behind a paywall.

Built for the table, not the spreadsheet

GrimSlate began with a simple frustration: army tools often make players choose between depth, speed, and a polished mobile experience. The project aims to bring those qualities together in one focused interface.

It is designed around the moments that matter: exploring a faction, turning an idea into a legal roster, checking a datasheet without losing your place, sharing a list, and keeping a battle moving.

Product principles

Clarity first

Dense rules and choices should still be easy to scan and understand.

Table ready

Mobile is a primary surface, not a reduced desktop afterthought.

Local first

Build immediately; create an account only when cloud and social features help.

Respectful by design

Privacy choices, attribution, and community safety are product features.

What GrimSlate does today

Browse factions, units, datasheets, rules, and points across supported editions.
Build, validate, duplicate, import, export, and share army rosters.
Use local-first storage with optional account sync across devices.
Follow players, discover public lists, comment, save favourites, and report issues.
Create or join live games, track scoring and unit state, and run combat estimates.
Install the progressive web app and keep key reference flows available offline.

An independent, evolving project

GrimSlate is independently designed and developed with modern web technology, including Next.js, Supabase, and a local-first browser store. Community-maintained data and player feedback make the useful parts possible.

There is deliberately no creator biography, portrait, employer history, or personal story on this page. None of that is necessary to understand or trust the product. Accountability belongs in the legal and contact information; the About page should explain the project itself.

The roadmap is intentionally not a promise list. Priorities change with new editions, data quality, community feedback, reliability work, and the time available to sustain an independent project.

Community-powered, responsibly

Thanks to the BSData contributors, testers, issue reporters, list builders, and players who share thoughtful feedback. GrimSlate benefits from their work without claiming ownership of the worlds or game systems they support.

GrimSlate is an unofficial fan project and is not affiliated with or endorsed by Games Workshop. For the precise attribution and accuracy notice, read the Disclaimer.

Ideas, corrections, or support questions: command@grimslate.com.

This page is intended to be clear and useful. If anything is ambiguous, contact us before relying on it.